A Sweet Story!

Girl to Boy   :        Why do you keep following me ? 
Boy              :        Bcoz you are so pretty and I am falling in love with you. 
Girl              :        Really ? but you haven't met my friend yet, she is prettier than me, 
                   and she is just right behind you (the guy looked behind him but found no one), 
Boy              :        Are u making fun of me, there is no one behind me. 
Girl              :        I know she replied, but if you really love me, you won't look back.